Microporous glassy fillers for dental composites

Abstract

Abstract A microporous filler giving greatly improved finishability, systemic nontoxic X‐ray opacification, low thermal expansion (27.2 × 10 −6 /°C), and satisfactory translucencies has been developed for dental composite resin restorations. These fillers are prepared from frits obtained by the low‐temperature calcination of gelled inorganic sols followed by a pulsed high‐temperature treatment. Composites prepared from these fillers are within the range of commercial products with regard to strength and setting contraction.